fix(ui): восстанавливать контекст OSPF из URL

tests/e2e/ospf-context.spec.ts

@@ -30,6 +30,7 @@ for (const change of ["backend", "mode"]) for (const operation of ["read", "writ
   await page.getByRole("button", { name: operation === "read" ? "Обновить" : "Оптимизировать OSPF", exact: true }).click()
   await expect.poll(() => started).toBe(true)
   await page.goBack()
+  await page.goBack()
   await expect(page).toHaveURL(/settings/)
   if (change === "backend") {
     const input = page.getByPlaceholder("http://localhost:8000")